1 files changed, 4 insertions, 0 deletions
diff --git a/lib/mutex_m.rb b/lib/mutex_m.rb
index 081bb788e4..b9937b635d 100644
--- a/lib/mutex_m.rb
+++ b/lib/mutex_m.rb
@@ -78,6 +78,10 @@ module Mutex_m
     @_mutex.unlock
   end
 
+  def sleep(timeout = nil)
+    @_mutex.sleep(timeout)
+  end
+
   private
 
   def mu_initialize